Monerh A

task-1/com.hyfacademy/Main.java

@@ -1,6 +1,9 @@
+import com.hyfacademy.service.GradeService;
+
 public class Main {
     public static void main(String[] args) {
-        System.out.println("Hello World!");
+        GradeService service = new GradeService();
+        service.run();
     }
 }
 

task-1/com.hyfacademy/model/Student.java

@@ -0,0 +1,50 @@
+package com.hyfacademy.model;
+
+import com.hyfacademy.util.GradeUtils;
+
+public class Student {
+	private String name;
+	private String studentId;
+	private int[] grades;
+	private static int totalStudents = 0;
+
+	public Student(String name, String studentId) {
+		this.name = name;
+		this.studentId = studentId;
+		this.grades = new int[5];
+		totalStudents++;
+	}
+
+// Getters
+	public String getName() {
+		return name;
+	}
+	public String getStudentId() {
+		return studentId;
+	}
+	public int[] getGrades() {
+		return grades;
+	}
+	public static int getTotalStudents() {
+		return totalStudents;
+	}
+
+// Setter
+	public void setGrade(int moduleIndex, int grade) {
+		if (moduleIndex < 0 || moduleIndex > 4) {
+			System.out.println("Error: moduleIndex must be between 0 and 4.");
+			return;
+		}
+		if (grade < 0 || grade > 100) {
+			System.out.println("Error: grade must be between 0 and 100.");
+			return;
+		}
+		grades[moduleIndex] = grade;
+	}
+
+// %s for strings and %.2f for decimal numbers with 2 decimal numbers with 2 digits after the point, like 72.40
+	public String toString() {
+		double average = GradeUtils.calculateAverage(grades);
+		return String.format("[%s] %s — Avg: %.2f — %s", studentId, name, average, GradeUtils.isPassing(average) ? "PASS" : "FAIL");
+	}
+}

task-1/com.hyfacademy/service/GradeService.java

@@ -0,0 +1,164 @@
+package com.hyfacademy.service;
+
+import com.hyfacademy.model.Student;
+import com.hyfacademy.util.GradeUtils;
+
+import java.util.Scanner;
+
+public class GradeService {
+	private static final int MAX_STUDENTS = 20;
+
+	private final Student[] students;
+	private int studentCount;
+	private final Scanner scanner;
+
+	public GradeService() {
+		this.students = new Student[MAX_STUDENTS];
+		this.scanner = new Scanner(System.in);
+	}
+
+	public void addStudent() {
+		if (studentCount >= MAX_STUDENTS) {
+			System.out.println("Student limit reached.");
+			return;
+		}
+
+		System.out.print("Enter student name: ");
+		String name = scanner.nextLine().trim();
+		students[studentCount] = new Student(name, String.format("HYF-%03d", studentCount + 1));
+		studentCount++;
+		System.out.println("Added.");
+	}
+
+	public void enterGrades() {
+		System.out.print("Enter student ID: ");
+		Student student = findStudentById(scanner.nextLine().trim());
+		if (student == null) {
+			System.out.println("Student not found.");
+			return;
+		}
+
+		for (int i = 0; i < GradeUtils.MODULE_COUNT; i++) {
+			System.out.print("Enter grade for " + GradeUtils.MODULE_NAMES[i] + ": ");
+			student.setGrade(i, readInt());
+		}
+	}
+
+	public void viewAllStudents() {
+		if (studentCount == 0) {
+			System.out.println("No students yet.");
+			return;
+		}
+
+		String border = "══════════════════════════════════════════════════════════════";
+
+		System.out.println();
+		System.out.println(border);
+		System.out.printf("  %-10s %-20s %-9s %-7s %-6s%n", "ID", "NAME", "AVERAGE", "GRADE", "STATUS");
+		System.out.println(border);
+
+		int passing = 0;
+		for (int i = 0; i < studentCount; i++) {
+			Student student = students[i];
+			double average = GradeUtils.calculateAverage(student.getGrades());
+			if (GradeUtils.isPassing(average)) {
+				passing++;
+			}
+			System.out.printf("  %-10s %-20s %-9.2f %-7s %-6s%n", 
+				student.getStudentId(), 
+				student.getName(), 
+				average,
+				GradeUtils.getLetterGrade(average),
+				GradeUtils.isPassing(average) ? "PASS" : "FAIL");
+		}
+
+		int failing = studentCount - passing;
+		System.out.println(border);
+		System.out.println("  Total students: " + studentCount + "   Passing: " + passing + "   Failing: " + failing);
+		System.out.println(border);
+	}
+
+	public void viewStudentReport() {
+		System.out.print("Enter student ID: ");
+		Student student = findStudentById(scanner.nextLine().trim());
+		if (student == null) {
+			System.out.println("Student not found.");
+			return;
+		}
+
+		double average = GradeUtils.calculateAverage(student.getGrades());
+		String separator = "══════════════════════════════════════";
+		String dashedLine = "──────────────────────────────────────";
+
+		System.out.println();
+		System.out.println(separator);
+		System.out.println("  STUDENT REPORT");
+		System.out.println(separator);
+		System.out.println("  ID      : " + student.getStudentId());
+		System.out.println("  Name    : " + student.getName());
+		System.out.println(dashedLine);
+		System.out.println("  MODULE GRADES");
+		System.out.println(dashedLine);
+
+		int[] grades = student.getGrades();
+		for (int i = 0; i < GradeUtils.MODULE_COUNT; i++) {
+			int grade = grades[i];
+			String moduleName = GradeUtils.MODULE_NAMES[i];
+			String status = GradeUtils.isModulePassing(grade) ? "PASS" : "FAIL";
+			System.out.printf("  %-25s : %3d   %s%n", moduleName, grade, status);
+		}
+
+		System.out.println(dashedLine);
+		System.out.printf("  Average  :  %.2f%n", average);
+		System.out.println("  Grade    :  " + GradeUtils.getLetterGrade(average));
+		String statusSymbol = GradeUtils.isPassing(average) ? "✓" : "✗";
+		System.out.println("  Status   :  " + statusSymbol + " " + (GradeUtils.isPassing(average) ? "PASS" : "FAIL"));
+		System.out.println(separator);
+	}
+
+	public void run() {
+		while (true) {
+			System.out.println();
+			System.out.println("╔══════════════════════════════════════╗");
+			System.out.println("║         HYF ACADEMY — GRADE MGR      ║");
+			System.out.println("╚══════════════════════════════════════╝");
+			System.out.println("  1. Add student");
+			System.out.println("  2. Enter grades");
+			System.out.println("  3. View all students");
+			System.out.println("  4. View student report");
+			System.out.println("  5. Exit");
+			System.out.println("══════════════════════════════════════");
+			System.out.print("Choose an option: ");
+
+
+			switch (readInt()) {
+				case 1 -> addStudent();
+				case 2 -> enterGrades();
+				case 3 -> viewAllStudents();
+				case 4 -> viewStudentReport();
+				case 5 -> { return; }
+				default -> System.out.println("Invalid option.");
+			}
+		}
+	}
+
+	private Student findStudentById(String id) {
+		for (int i = 0; i < studentCount; i++) {
+			if (students[i].getStudentId().equalsIgnoreCase(id)) {
+				return students[i];
+			}
+		}
+		return null;
+	}
+
+	private int readInt() {
+		while (!scanner.hasNextInt()) {
+			scanner.nextLine();
+			System.out.print("Enter a valid number: ");
+		}
+
+		int value = scanner.nextInt();
+		scanner.nextLine();
+		return value;
+	}
+}

task-1/com.hyfacademy/util/GradeUtils.java

@@ -0,0 +1,57 @@
+package com.hyfacademy.util;
+
+public final class GradeUtils {
+	public static final int MODULE_PASS_MARK = 55;
+	public static final double TRACK_PASS_AVERAGE = 60.0;
+	public static final int MODULE_COUNT = 5;
+	public static final String[] MODULE_NAMES = {
+		"Java Basics",
+		"Control Flow",
+		"OOP Fundamentals",
+		"Arrays & Collections",
+		"Input & Output"
+	};
+
+	private GradeUtils() {
+	}
+
+	public static double calculateAverage(int[] grades) {
+		if (grades == null || grades.length == 0) {
+			return 0.0;
+		}
+		int total = 0;
+		for (int grade : grades) {
+			total += grade;
+		}
+		return (double) total / grades.length;
+	}
+
+	public static boolean isPassing(double average) {
+		return average >= TRACK_PASS_AVERAGE;
+	}
+
+	public static boolean isModulePassing(int grade) {
+		return grade >= MODULE_PASS_MARK;
+	}
+
+	public static String getLetterGrade(double average) {
+		if (average >= 90.0) {
+			return "A";
+		}
+		if (average >= 80.0) {
+			return "B";
+		}
+		if (average >= 70.0) {
+			return "C";
+		}
+		if (average >= 60.0) {
+			return "D";
+		}
+		return "F";
+	}
+
+// %3d to print integer with 3 characters width, right-aligned
+	public static String formatGrade(int grade) {
+		return String.format("%3d", grade);
+	}
+}